To suppress signal attenuation caused by the repeating of sequence in consecutive photographing such as the measurement of an electrocardiogram synchronization function.

In advance of consecutive photographing, a cross section to be photographed is photographed at least twice for different repeating times TR to calculate a T1 value (101). Next, the cross section is consecutively photographed, then each TR at the time of photographing is stored in a memory (103). After finishing photographing, with respect to the echo signal for every photographing, a signal attenuation value caused by consecutive photographing is estimate from a T1 value and TR stored in the memory to correct an echo signal quantity (106). Even when TR is varied due to the fluctuation of heartbeats in electrocardiogram synchronization photographing, signal variation between images is detected precisely and is imaged (107).